Honritone 10 Micron Filter Sock – 7 Inch Ring By 17 Inch Long – 2 Pack – Felt Filter Bags For Industrial, Aquarium Sump, Pond, Reef Tank, Chemicals (10 Micron – 7 Inch Steel Ring)

Material:Polypropylene (PP) Size(Ring DiameterLong Length): 7 inch x 17 inch Available in 10 Micron Packing Quantity: 2 Pack Filter Sock Kindly Tips:Porosity is defined by nominal micron ratings (1 510255075100200) indicating the largest particle that can pass through in general and reflecting an increase in the density. 1Micron mesh very small200Micron mesh more wider.